Solomon marks



S. MARKS. DOUBLE SLATE.

(No Model.)

Patehted Apr. 19, 18 92 u m I I I I I I 0 lIIIIIIIIIlII/lll mi nonmsPETERS cm, vnorcrumo msmxwou, n4 4:.

ata "rams Far-an i? *FFE SOLOMON MARKS, OF CINCINNATI, OHIO, ASSIGNOR TOTHOMAS KANE & CO.

Dou BLE SLATE.

SPECIFICATION forming part of Letters Patent No. 478,404, dated April19, 1892.

Application filed May 2, 1891; Serial No- 391,394. (No model.)

To aZZ whom it may concern.-

Be it known that I, SOLOMON MARKS, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented a certain new and useful Improvement in Double Slates, ofwhich the following is a specification.

My invention relates to, reversible double slates for school and otherpurposes.

The object of my invention is to provide such slates with an improvedcord-hin go which when severed can be removed without destroying theappearance of the slates as single slates, and thereby at the same timeovercoming the existing disadvantage of a previous construction ofdouble-slate hinge, where the muffiing and hinge cords are combined, sothat the severing of a single cord will destroy the hinge and also themuffler. In my construction the hinge and muffling cords areindependent, so that the severing of a hinge-cord will onlyloosen thehinge and not afiect the other part of the slate, because the hingecordcan when worn through be entirely removed to produce two single slat-es.

My improvement consists in novel features of construction, hereinafterdescribed and claimed. 7

In order that my invention may be fully understood, I will proceed todescribe it with reference to the accompanying drawings, in which FigureI is an elevation of a hinge portion of a reversible muffled doubleslate in open condition, showing my improved hinge applied thereto. Fig.II is an edge elevation of the same in closed condition. Fig. III is aview similar to that shown in Fig. I, the muffling and protecting cordsand binding being omitted.

Two slates precisely similar in construction are each formed with asuitable writingsurface 1 and a frame 2. The frame is formed withcustomary series of holes or perforations 3, and may be bound with asuitable binding 4, such as felt, flannel, or cloth or other analogousmaterial which will act as a protector. This binding may be secured byovercast muffling-cords or edge-stitching threaded through the holes orperforations, such as a cord 5, looped over the outer edge of the frameat right angles thereto, as shown in Figs.I and II. For protecting theedges of the binding I apply cords 6 in the form of cobbler-stitchingthreaded through the holes in such a manner that when desired thehinge-cords can be readily removed without leaving the two slatesdisfigured in the slightest degree.

My cord-hinge is applied and constructed as now described and extendsbetween the adjacent edges.

8 is a cord fastened at one end by a peg 9, inserted in a hole 10 in theright side and threaded as follows: The cord extends from the rearend'of the hole 10 behind the right side obliquely between the edges ofthe right and left sides, in front of the left side, through a hole 11,behind the left side obliquely between the edges of the sides, in frontof the right side, through a hole 12, behind the right side obliquelybetween the edges of the sides, in front of the left side, through ahole 13, be hind the left side, transversely betweenthe edges of thesides, again in front of the left side, and again through the hole 13 toform a loop 14, again behind the left side, between the edges of thesides, in front of the right side, through the hole 15, behind the rightside, between the edges of the sides, again in front of the right side,and again through the hole 15 to form a loop 16, again behind the rightside obliquely between the edges of the sides across itself, in front ofthe left side, through the hole 17, behind the left side obliquelybetween the edges of the sides across itself, in front of the rightside, through a hole 18, behind the right side, obliquely between theedges of the sides across itself, in front of the left side, through ahole 19, behind the left side, transversely between the edges of thesides, again in front of the left side, and again through the hole 19 toform a loop 20, again behind the left side, between the sides, in frontof the right side, again throughtheholelO,againbehind the rightside,again transversely between the edges of the sides, again in front of theright side, again through the hole 10 to form a loop 21, again behindthe right side, again between the edges of the sides, again in front ofthe left side, and again through the hole 19, where its other endsecured by a peg 22. cord-hinge at the other end of the double slate isconstructed in a similar manner. \Vhere mut'l'ling or protecting cordsor both mut'tling and protecting cords are employed, I may dispense withthe loops of the ,cordhinge which extend through the holes and aroundthe edge.

It will be observed that my cord-hinge, be ing passed through the sameholes as the protecting and mui'tling cords, will produce additionalfrictional hold between the stitches, so that if one portion of thehingecord be;

comes worn or severed the other portions of the hinge-cord will hold theparts togethe for some time.

Having thus described my invention, the

following is what Ielaim as new therein and The the other frame in theopposite direction, and having its ends fastened in adjacent holes,substantially as described.

2. The combination, with two slate-frames having holes or perforationsand independent inut'iling-cords threaded through the holes orperforationsof a distinct cord-hinge extending between the adjacentsides and consisting of a cord fastened at one end, threaded through theholes or perforations of the muf- Iling-cords, extending behind and infront of the side and between the contiguous edges thereof and fastenedat the other end, the lnufiiing-cords reinforcing and securing thecord-hinge by frictional hold, substantially described.

The combination,with two slate-frames having holes or perforations andindependent protecting and mntiiing cords, of a distinct cord-hingeextending between the adjacent sides and consisting of a cord fastenedat one end, threaded through holes or perforations of the protecting andmufiling cords, extending behind and in front of the sides and betweenthe contiguous edgcs thereof in one direction and returned and threadedthrough holes or perforations of the protecting and in uftling cords,extending behind and in front of the sides and between the contiguousedges thereof in the opposite direction, and

